/Engine/Source/Developer/ToolWidgets/Public/SSimpleTimeSlider.h
Use this event sparingly as preview events generally make UIs more difficult to reason about.
virtual [FReply](API\Runtime\SlateCore\Input\FReply) OnPreviewMouseButtonDown ( const [FGeometry](API\Runtime\SlateCore\Layout\FGeometry) & MyGeometry, const [FPointerEvent](API\Runtime\SlateCore\Input\FPointerEvent) & MouseEvent )